Check if a inputted variable is a number or a string, given a string input (i.e. '1' is 1 and thus a number, 'a' is a string).
Additional test cases have been added.
Flip the main diagonal of a matrix
Find the nearest integer
Min of a Matrix
Matlab Basics - Absolute Value
Converting binary to decimals
Matrix Ax=B problem
Vector indexing: lower than mean
Matrix element wise multiplication
Simple String Concatenation
Simple Vector Addition
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